Why running environment as motor bearing life is poor so much?

Motor bearing is cannot lack of the key components of machinery and equipment, whose lifespan by more and more concern. 。 。 。 。 。 But in peacetime, we can check to the significant view, in the same job under standard, consistent appearance specifications of bearing, the service life of the concrete are very different. Why is this? Be careful the following several aspects. 1. Together too tightly when compulsory set into the motor shaft bearing inner hole, light will make the raceway caused serious damage to the bottom of the loop trajectory, or within the slippery course which will be opened, the lateral and ball. Ball and slide rail gap is too small, torque, friction, bearing operating temperature is exorbitant, increases damage of bearing and tired and invalid. Avoid repair bearing radial clearance, reduce interference. Bearing installation quality inspection means has two kinds: estimate method: after the motor end cover bearing chamber with bearing, forcibly rotating the end cover, if the bearing rotating easy and flexible, no vibration and rock conditions, as a standard. Micrometer test: will be equipped with a bearing motor end cover assembled on the motor shaft notches, with 0. 3 mm thick micrometer inspection of bearing the radial gap of one week, if a larger gap area right at the middle (above Motor vertical installation) , it is appropriate, available, otherwise, the poor installation. As far as possible, adjust the end cover parts and reassemble until up to standard. 2. Poor RunHua reason is serious lack of lubricating grease or vegetable oils become withered embrittlement. Because of motor speed, friction heat production, lead to motor bearing temperature and air oxidation discoloration, main show is bearing ball, cage and inner hole, and the place such as the motor shaft into a dark brown or dark blue. Avoid way: on the basis of motor operation time, working temperature, load, lubrication oil and four elements, such as clear the oil and oil in time. General situation, the motor operates 6000 ~ 10000 h to fill oil 1 times; Operation of 10000 ~ 20000 h should be an oil change, oil change quantity to 1/2 ~ 2/3 of the bearing chamber size, and should choose high quality grease. 3. Installation is not accurate if not to, is not only the bearing slides usu mark, uneven and ball bearing damage mark, also causes tilt, micrometer inspection when the radial gap on both sides of the bearing is differ, and the distance is large. Reason may be immediately with an iron hammer knock bearing lateral; Belt is pulled ( Drive gear teeth bite) Too loose or too tight; The axis of rotation and passive wheel axis is not parallel surface. When the tilt more than 1/1000, can lead to bearing operating temperature is too high, slide rail and ball bearing is seriously damaged, the shaft bending and end cover anchor bolt clamping surface and the center line of the anchor bolt is not vertical. Proper installation method using Kong Guangjie leveling, and bearing inner hole within its thickness is basically the same seamless steel tube socket specification, the motor bearing pressure on the appropriate parts of the clean motor shaft. Pressure should be the symmetry fashion forward, can not too hard. Then according to the different motor speed than inspection bearing end cover of the radial deflection of allowable values. 4. Obvious vibration when the motor iron core is a common fault, can make the bearing vibration significantly. Because iron core in thermal deformation; Motor bearing embrittlement; The shaft bending deformation greatly; End cover slot twist anchor bolt for shaking loose; Basic weak bearing vibration. The above is the content of the author to share today, want to learn more bearing small knowledge check bearing's official website.